Inverted incandescent or glow lamp.



PATENTED AUG. 11, 1908.

4 A. J. HOFMANN. INVERTED INGANDESGENT OR GLOW LAMP.

APPLICATION FILED MAY 14, 190 6.

ADAM J. HOFMANN, OF NEWARK, NEW JERSEY.

INVERTED INCANDESCENT OR GLOW LAMP.

To all whom it may concern:

Be it known that I, ADAM J. HOFMANN, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Inverted Incandescent or Glow Lamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention has reference, to improvements in that class of gas-lamps and burners known in the art as inverted incandescent or glow gas-lamps; and, the invention relates, more particularly, to a novel means to be used with inverted incandescent or glow gas lamps and burners of a character hereinafter more particularly specified, which provides for the expansion of the gas at the burner-tip, thereby causing an even and regular pressure of the gas, notwithstanding the fluctuation of pressure in the main gas supply. The even and regular pressure of the gas, thus produced, provides for a continuous and steady glow of the light, and also causes all the gas to be consumed or burned, thereby preventing carbonization upon the mantle, which blackens the same and furthermore, prevents the collection of soot or carbon in the burner-tube, which by dropping down upon the inverted mantle soon breaks or destroys the said mantle.

My invention has for its principal objects to provide an inverted incandescent or glow gas-lamp, comprising a regulator and mixer controlling the supply of air and gas through the burner-tube, a burner-tube constructed preferably in the shape of a horse-shoe to afford a direct upward passage of the air and gas, and to thoroughly mix the same; and, a burner-tip, provided with an expansion-chamber, wherein the gas expands before i nition thereb roducin an even or.

regular pressure and in consequence thereof a uniform combustion.

Y A further object of the present invention is to provide a novel means for supporting the mantle, preferably in the form of U-shaped receiving-sockets arranged upon the outer surface of the burner-tip.

A still further object of the present invention is to provide a means for setting or lock- Specification of Letters Patent. Application filed. May 14, 1906.

Patented Aug. 11, 1908. Serial No. 316,603.

ing the burner tube in the desired position, where it is held immovable and is not disturbed by vibrations of the building or other causes.

Other objects of the present invention not at this time more particularly mentioned,will be evident from the following detailed description of my present invention.

My invention consists, therefore, in the novel inverted incandescent or glow gas lamp and burner hereinafter more fully specified; and, furthermore, this invention consists 1n the several arrangements and combinations of devices and parts, as well as in the details of the construction of the same, all of which will be more fully described in the accompanying specification, and then finally embodied in the clauses of the claims which are appended to and which form an essential part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which :-v

' igure 1 is a side elevation of a portion of a gasracket provided with the novel con struction of inverted incandescent or glow gaslamp, embodying the principles of the present invention, certain parts thereof being shown in transverse section. Fig. 2 is a 101i gitudinal vertical section of the same, the globe and mantle being removed, and the globe holder being partly broken away. Fig. 3 is a top-view of the burner-tip removed, illustrating more particularly the holding means for securing the mantle thereto; and Fig. 4 is a side elevation of the same. Fig. 5 is a detail cross section, taken on line 55 in Fig. 1, and looking in the direction of the arrow X. Fig. 6 is a bottom view of one endportion of the burner-tube, illustrating more particularly a portion of the means for secur ing and locking the said burner-tube in the desired position.

Similaar characters of reference are employed in all of the above described views to indicate the corresponding parts.

Referring now to.the several figures of the said drawings, the reference-character 1. indi cates a portion of a gas bracket or chandelier, provided with the usual gas-cock 2. Secured upon the screw-threaded portion 3 of the said gas-bracket or chandelier 1, by menas of the screw-threaded union 4 is the air-intake 5, said airintake 5 being provided with the openings or holes 6 upon its under side, through which the air passes into the chamber 7. The said union 4 is provided at its upper end with a screw-threaded opening 8, into which is screwed the gas-intake 9 pro vided with a small perpendicular perforation or hole 10 through which the gas passes into and through the chamber 7 of the air-intake 5. The said air-intake 5 terminates at its upper extremity in a tubular-duct 11. The said air-intake 5 is furthermore provided upon its upper outer surface with annularly disposed serrations 12.

A burner-tube 13, preferably constructed in the shape of a horse-shoe, is adapted to be pushed over the said tubular-duct 1.1 of the said air-intake 5, and is held thereon by frictional contact therewith. The said burner tube 13 is provided at its one end with screwthreads 1 1 upon which is screwed a nut or shoulder-piece 15, the said nut or shoulderpicce 15 being provided upon its undersurface with annularly disposed serrations 16, adapted to engage or dove-tail with the annularly disposed serrations 12 upon the upper outer surface of the said air-intake 5, when the said burner-tube 13 is pushed down upon the said tubular-duct 11 of the said air-intake 5, as previously described. The said serrations 12 and 16 when brought in contact with each other will thus lock and hold the said burnertube 13 at any angle in a horizontal plane at which it may be set, and the burner-tube 13 and the other connections secured thereto will remain stationary, notwithstanding any vibration of the building, or other causes, which would tend to swing it around upon the said tubular duct 11. Hence the light always remains in the position desired and the regulator is undisturbed. The free-end of the said burner-tube 13 is provided with screw-threads 17 upon which is screwed a tubular member 18 of a globe holder, the said tubular-member 18 being provided with an annular flange 19 upon which is secured the spider 20, by means of rivets 21, or in any other suitable manner.

he spider 20 of the globe holder is provided upon its outer circumference with a flange 22 to which is secured in any suitable manner, the ring 23, which may be made of any desired conformation or configuration. Suitably disposed upon the flange 22 and ring 23 are any desired number of screwthreaded eyelets 24, into which are screwed holding or retaining screws 25 which engage the upper annular flange 26 of a globe 27 in its normal relation in connection with the in.- candescent or glow gas lamp and burner.

Screwed. upon the lower portion of the screw-threads 17 of the burner-tube 1.3, below said globeholder, is a burner tip 28. This burner-tip consists of a tubular cylindrically shaped body terminating at its lower free end in a tapering element 29. The inner tubular portion of the upper and larger part of the tip is a straight cylinder, as shown, but the inner tubular portion of the seepze element 23 is made tapering, as indicated at 39, see Fig. 2, said tapering surfaces terminating in a horizontally disposed flat and annular shoulder 40, forming in the extreme lower end of the burner-tip a small centrally disposed hole or gas-outlet 30. The purpose of said horizontal annular shoulder is to positively retard or choke off the supply of the gas as it is conducted into the interior of the tip.

The above described construction of burner-tip provides an exp ansionchamb or 31. wherein the gas is received from the burnertube 13 and expands before ignition, and by entirely filling the interior of the tip the gaspressure is clearly equalized and any unequal pressure in the main gas-supply is compensated for. A uniform supply of gas at the outlet 30 and a more perfect and regular combustion will hence be the result. Secured upon the outer surface of the said burner-tip 28, and forming preferably an integral part thereof, are any desired number of suitably disposed receivers or holders which consist, essentially, of an annularly extending rib or flange 33, provided with op enings or slots 34 upon the outer ClICUH'IfOI'OHCO thereof. Arranged upon the upper surface of the said rib or flange are short upwardly extending arms 35 and longer upwardly extending arms 36 each of the said pair of arms 35 and 36 providing an intervening space which forms a receiving socket 32. The purpose of the longer arms 36 is to afford stops or guides against which the inwardly extending arms or lugs 37 of the mantle-carrier 38 come to rest, after being inserted through the openings or slots 34 and turned across the short arms 35, and before being finally dropped into place in the said receivingsockets 32. The said receivingsocl-:ets con structed as above described lock the mantlecarrier in its proper relation with the burnertip 28, and prevent its accidental displacement by vibration, j ars, or other causes. The said mantlecarrier 38 supports or carries the usual form of inverted incandescent gas lamp mantle 39.

From the foregoing description of the present invention, it will be clearly understood, that I have devised a cheaply constructed and efficiently operating inverted incandescent or glow gas-lamp and burner, which. provides for the uniform and regular combustion of the gas, and prevents carbonization and its consequent injurious effects; and, furthermore, provides an inverted incandescent or glow gas-lamp and burner, which is not disturbed in its operation by vibration, jars, or other causes.

I claim 1. In an inverted incandescent gas-lamp and burner, the combination, with a burnertube having a screw-threaded end-portion, of a burner-tip screwed upon said screwthreaded portion of the burner-tube, said tip comprising a tubular cylindrically shaped body terminating at its lower free end in a tapering element, the upper inner tubular portion of said tip being cylindrical and the lower tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder, and forming in the lower end of the tip a small centrally disposed gas-outlet, all arranged to retard and choke off the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within the tip, substantially as and for the purposes set forth.

2. In an inverted incandescent gas-lamp and burner, the combination, witha burnertube having a screw-threaded end-portion, of a burner-tip screwed upon said screwthreaded portion of the burner-tube, said tip comprising a tubular cylindrically shaped body terminating at its lower free end in a tapering element, the upper inner tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder, and forming in the lower end of the tip' a small centrally disposed gas-outlet, all arranged to retard and choke off the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within'the tip, combined with annularl T extending ribs upon the outer surface of the burner-tip, said ribs having intervening spaces between them, and a pair of arms extending upwardly from each rib, said arms and ribs forming receiving, sockets, and one of the arms upon each rib being of greater length than the other arm upon the same rib, substantially as and for the purposes set forth.

3. In an inverted incandescent gas-lamp and burner, the combination, with a burnertube having a screw-threaded end-portion, of a burner-tip screwed upon said screw-threaded portion of the burner-tube, said tip comprisingatubularcylindricallyshapedbodyterminating at its lower free end in a tapering element, the upper inner tubular portion of said tip being cylindrical and the lower tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder, and forming in the lower end of the tip a small centrally disposed gas-outlet, all arranged to retard and choke off the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within the tip, combined with annularly extending ribs upon. the outer surface of the burner-tip, said ribs having intervening spaces between them,- and a pair of arms extending upwardly from each rib, said arms and ribs forming receiving sockets, and one of the arms upon each rib being of greater length than the other arm upon the same rib,

-upon the outer from said receiving sockets, substantially as and for the purposes set forth.

4. In an inverted incandescent gas-lamp and burner, the combination, with a burnertube having a screw-threaded end-portion, of a burner-ti screwed upon said screw-threaded portion 0 the burner-tube, said tip comprising a tubular cylindrically shaped body terminating at its lower free end in a tapering element, the upper inner tubular portion of said tip being cylindrical and the lower tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder, and forming in the lower end of the tip a small centrally disposed gas-outlet, all arranged to retard and choke off the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within the tip, a tubular member also screwed upon the screw-threaded portion of said burner-tube,

said member being provided with an annular flange, a spider-frame arrangedupon said flange, and a globe suspended from said spider-frame, substantial y as and for the purposes set forth.

5. In an inverted incandescent gaslamp, and burner, the combination, with a burnertube having a screw-threaded end-portion, of a burner-tip screwed upon said screwthreaded portion of the burner-tube, said tip comprising a tubular cylindrically shaped body terminating at its lower free end in a tapering element, the upper inner tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder, and forming in the lower end of the tip a small centrally disposed gas-outlet, all arranged to retard and choke off the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within the tip, combined with annularly extending ribs surface of the burner-tip, said ribs having intervening spaces between them, and a pair of arms extending upwardly from each rib, said arms and ribs forming receiving sockets, and one of the arms upon each rib being of greater length than the other arm upon the same rib, a tubular member also screwed upon the screwthreaded portion of said burner-tube, said member being provided with an annular flange, a spider-frame arranged upon said flange, and a globe suspended from said spider-frame, substantialy as and for the purposes set forth.

In an inverted incandescent gas-lamp and burner, the combination, with a burnertube having a screw-threaded end-portion, of a burner-tip screwed upon said screwthreaded portion of the burner-tube, said tip comprising a tubular cylindrically shaped body terminating at its lower free end in a and a mantle-carrier removably suspended I tapering element, the upper inner tubular portion of said tip being cylindrical and the 1 lower tubular portion of said tip being made tapering, the tapering surface terminating in an internally disposed flat annular shoulder,

and forming in the lower end of the tip a small centrally disposed gas-outlet, all ari ranged to retard and choke oil the supply of the gas within said gas-tip so as to completely maintain a continuous supply of gas within the tip, combined with annularly extending ribs upon the outer surface of the burnertip, said ribs having intervening spaces between them, and a pair of arms extending upwardly from each rib, said arms and ribs forming receiving sockets, and one of the arms upon each rib being of greater length than the other arm upon the same rib, and a mantle-carrier removably suspended from said receiving sockets, a tubular member also screwed upon the screw-threaded portion of said burner-tube, said member being provided with an annular flange, a spider-frame arranged upon said flange, and a globe susended from said spider-frame, substantially as and for the purposes set forth.

In testimony, that I claim the invention set forth above I have hereunto set my hand this 9th day of May, 1906.

ADAM J. HOFMANN.

Witnesses FREDK. O. FRAENTZEL, FREDERICK JAMISON. 

